Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. Infected people shed unsporulated (non-infective; immature) Cyclospora cayetanensis oocysts in their stool; immature oocysts usually require at least 1 week under favorable laboratory conditions to sporulate (become infective). An unsporulated oocyst, with undifferentiated cytoplasm, is shown (far left), (A) next to a sporulating oocyst that contains two immature sporocysts. (B) An oocyst that was mechanically ruptured has released one of its two sporocysts. (C) One free sporocyst is shown as well as two free sporozoites, the infective stage of the parasite.
Stories this photo appears in:
Recently, a parasitic outbreak found in produce has caused a growing concern in the health community as well as the community at large.